28A12

Metric Roller Chain Sprocket

Item #100967145

32.02 mm Minimum Bore

126.57 mm Maximum Bore

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Product Details

Maximum bores shown will accommodate standard keyseat and setscrew over keyseat. Slightly larger bores are possible with no keyseat, shallow keyseat, or setscrew at an angle to keyseat.

Manufactured of high carbon steel
Precise machining and processes ensure consistent finish and high quality
Bores are concentric to pitch line, minimizing run out
Chain rows are parallel and precisely spaced to increase longevity of sprocket and chain

Specifications

Pitch Root Diameter	143.8 mm
Bore Range [Min]	32.02 mm
Root Diameter	143.8 mm
Inch/Metric	Metric
Pitch Diameter [Min]	171.7 mm
Martin No.	28A12
Pin Diameter	27.94 mm
Hardened Teeth	Without Hardened Teeth
No. of Teeth	12
Bore Style	Minimum Bore
Outside Dia.	199.36 mm
Hub Dia.	N/A
Caliper Diameter	143.8 mm
Pitch Diameter	171.7 mm
Sprocket Style	A
Bore Type	Reborable
Outside Dia. [Min]	199.36 mm
Bore Range [Max]	126.57 mm
No. of Strands Across	1
Chain Pitch	44.45 mm
Hub Length Thru	N/A
Hub Projection	N/A
Width Across Teeth	29.44 mm
Series	A
Material	Steel
Single Strand Tooth Thickness	29.44 mm
Family Name	No. 28 - 44.450 mm Pitch - Single - A
Length Through Bore	29.44 mm
Chain No.	28B, 28B-1
Weight	8.7 LB
EAN or UPC	697950406558